absolutely terrible. making long lines serves no purpose, they make the same value of money per trip but take forever, hubs dont seem to work, and "upgrades" are ludicrously priced while seemingly not working.
hubs make trains temporarily faster depending on how upgraded you have made your hubs, I also thought they only worked on 1 line until I actually paid attention. I'm not sure if the speed upgrade does anything, but the money upgrade does work, and the line upgrades do add more trains to the line, you can see them moving unless you accidentally make them overlap